Air intake system of an internal-combustion engine

Abstract

The air intake system of a two-bank internal-combustion engine has one resonance receptacle for each cylinder bank and an additional receptacle in the respective center. Via suction pipes, the resonance receptacles are connected to the cylinders and are mutually provided with connecting pipes, fresh air entering into one of these connecting pipes. Suction pipe extensions are connected to the other receptacle which partially extend inside the resonance receptacles and are arranged in them at a distance in an alignment with the admission funnels of the suction pipes. The combination of the connecting pipes acting as resonance pipes and the suction pipe extensions acting as swing pipes causes an increase of the mean pressure which raises the torque as well as the performance of the internal-combustion engine.

What is claimed is: 
     
       1. An air intake system of a multi-cylinder two-bank internal-combustion engine, the cylinder of one bank each being connected by suction pipes to a resonance receptacle assigned to said bank, comprising at least one connecting pipe between the resonance receptacles; and   suction pipe extensions which are respectively assigned to the suction pipes, and have sections that extend inside the resonance receptacles and are connected to a common receptacle that has a fresh-air inlet.   
     
     
       2. A system according to claim 1, wherein the connecting pipe has an additional fresh-air inlet. 
     
     
       3. A system according to claim 2, wherein the fresh-air inlet and the additional fresh-air inlet are jointly arranged in an inlet opening of the common receptacle. 
     
     
       4. A system according to claim 3, wherein at least one suction pipe extension of each cylinder bank has a shut-off element. 
     
     
       5. A system according to claim 3, wherein the sections of the suction pipe extension that extend inside the resonance receptacles are cylindrical, aligned with admission funnels of the suction pipes, and are separated from the admission funnels by a space. 
     
     
       6. A system according to claim 5, further comprising sliding sleeves on the sections of the and suction pipe extensions which are displaceable to selectively bridge the space. 
     
     
       7. A system according to claim 3, wherein the common receptacle, extending in the longitudinal direction of the cylinder banks is arranged approximately in the center between the resonance receptacles, and the connecting pipe is connected to the resonance receptacle which has an inlet opening on its end side. 
     
     
       8. A system according to claim 7, further comprising another connecting pipe extending in parallel to said one connecting pipe and arranged between the resonance receptacles, at least one of these pipes having at least one shut-off element. 
     
     
       9. A system according to claim 6, wherein the sliding sleeves of each resonance receptacle are coupled to form a constructional unit which is displaced by a control element arranged on the resonance receptacle. 
     
     
       10. A system according to claim 2, wherein at least one suction pipe extension of each cylinder bank has a shut-off element. 
     
     
       11. A system according to claim 2, wherein the sections 16 of the suction pipe extension that extend inside the resonance receptacles are cylindrical, aligned with admission funnels of the suction pipes, and are separated from the admission funnels by a space. 
     
     
       12. A system according to claim 10, further comprising sliding sleeves on the sections of the suction pipe extensions which are displaceable to selectively bridge the space. 
     
     
       13. A system according to claim 12, wherein the sliding sleeves of each resonance receptacle are coupled to form a constructional unit which is displaced by a control element arranged on the resonance receptacle.